California · river
San Mateo Creek below Junction Box A Dam1 near Hillsborough
USGS monitoring location. Launch access and paddling suitability have not been verified.
Weather comparison · not a safety rating
Favorable weather
Weather score out of 100
Weather only. This is a monitoring station, not a verified launch. Access, hazards and suitable flow are unknown.
Weather observation: Wed, 21 Oct 2026 20:45:00 GMT.
River observation: Wed, 21 Oct 2026 20:30:00 GMT.
Page checked: Wed, 21 Oct 2026 20:51:57 GMT. Readings older than one hour are not used for the current score.
Wind
5 mph
gusting to 6 mph
Air temp
65°F
22% chance of rain
River flow
0 cfs
Weather outlook
Saturday · 100
Wed
96
68°
Thu
72
63°
Fri
88
65°
Sat
100
72°
Best
Sun
100
73°
Mon
100
76°
Tue
100
71°
Compares forecast wind, air temperature and rain. Does not assess river flow, swell, currents, water temperature or launch access. All times are local to this location.
Wind, next 12 hours
mph| Hour | Wind (mph) | Gusts (mph) |
|---|---|---|
| 1p | 8 | 9 |
| 2p | 5 | 7 |
| 3p | 4 | 4 |
| 4p | 2 | 2 |
| 5p | 8 | 11 |
| 6p | 4 | 5 |
| 7p | 5 | 9 |
| 8p | 7 | 13 |
| 9p | 6 | 9 |
| 10p | 7 | 12 |
| 11p | 3 | 12 |
| 12a | 3 | 10 |
Why this score
- Wind — 5 mph — light wind at the forecast location±0
We don't have launch notes for this one
This page is built from the USGS gauge at this location, and uses available public readings. We haven't verified where to put in, what the hazards are, or whether this stretch is legal or sensible to paddle. We'd rather say that than invent it. The links below are where to find out.
We also don't have a verified safe-flow range here, so the Paddle Score reflects weather only. Judge the flow number against local knowledge, not against our score.
Do your own homework
We show you live conditions. For local knowledge — where to put in, what the hazards are, whether it's worth the drive — here's where paddlers actually talk about this water. We don't vet these sources; check the dates and judge for yourself.
- Paddler discussion on Reddit
Trip reports and local warnings, straight from the source
- Search American Whitewater
Rapid classifications and gauge-linked run descriptions
- Satellite view and access roads
Check parking, put-ins, and what the banks actually look like
- Video from this water
The fastest way to see the character of a run before you drive
- USGS gauge 11162737
Full hydrograph, historical flows, and station metadata
Nearby water
- San Mateo Creek above Junction Box A Dam1 near Hillsboroughunder 1 mi
- Pilarcitos Creek below Spillway near Hillsboroughunder 1 mi
- Pilarcitos Creek above Stone Dam near Hillsborough2 mi
- Pilarcitos Creek below Stone Dam near Hillsborough2 mi
- San Mateo Creek below Lo Crystal Sp Reservoir near San Mateo4 mi
- Pilarcitos Creek A Half Moon Bay6 mi